March 22, 1884

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Features

The New Electric Light at Hell Gate Lighthouse

Cable Railways for New York City

Malarial Fevers

The Plot Against Patents

Water Line Defense and Gun Shields for Cruisers

The Hostile Patent Bills

Metallic Railroad Tie

Improved Acoustic Telephone

Improved Car Coupling

Improvement in the Leclanche Battery

Improved Hand Truck

Oil on Troubled Waters

Another Curious Case of Freezing

The Twelve Thread Plume Bird

Engineering Inventions - March 22, 1884

Mechanical Inventions - March 22, 1884

Agricultural Inventions - March 22, 1884

Miscellaneous Inventions - March 22, 1884

Departments

Recommended

New Books and Publications - March 22, 1884

Departments

Notes and Queries - March 22, 1884

Business and Personal - March 22, 1884

Index of Inventions - March 22, 1884

Patents

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